Pay Back my deposit

I would just like to know why it takes so long to get my deposit. I moved out of the flat on the 5th of March 2015 at Lusam mansion, after paying the full rent for that month. i asked then to check out and start the process to get my deposit, and a consultant said they could not do that until the end of the contract end April. which then I came back to the building end March and checked out with the building manager who was impressed as all was in order so I owe nothing for damages and my rates are up to date. now I called to follow on my deposit they and they say I have to wait for meter readings. what meter reading when firstly I was on a prepaid power meter and as for the water I wasn't there the whole month (the building manager is aware) and sewage must be fixed....so really what is holding u from paying my money? yet when a tenant fails to pay City property will send threats and all, I wish they could pay me what is due as I have always done for them. I have kept my end of the contract and looked after their apartment the least they can do is pay me back. what meter reading do I owe when their building official is well aware that I wasn't there all month